How to prevent a user from changing the problem state before filling out the mandatory fields?

[eliana_wise]

Hi,

Can some one help me to setup a rule that prevents users from changing the state prior to filling out the fields that was set to be visible and be mandatory on another state. In this case I have too fields that I have created a UI policy for them to show up when our problems are at RCA review state, and they are both mandatory, but the problem is that a user can bypass this state and go the the next state; now is there any way to prevent this?

Thanks

[eliana_wise]

Thanks everyone for your responses, I wrote a UI policy for this and it worked. Thanks again for all your help